1. b. Towards the center of the circle
2. d. All of the above
3. c. It decreases by 16
4. a. 2.20 x 10^-4 N
5. c. The force of gravity on Earth is a force that repulses
6. b. In the center of an elliptical orbit
7. b. Its orbital speed decreases
8. c. 4.97 years
1. The direction of the centripetal force is always
a. Towards the edge of the circle
b. Towards the center of the circle**
c. Towards the object that is moving
d. Towards the surface of the planet
2. While an object is being moving a in a circle, it is the centripetal force that keeps it moving like this. Yet, when the centripetal force is removed, the object will begin to move forward in the last direction it was facing. This is due to
a. The object has a forward moving momentum
b. Newton's First Law says that when the centripetal force is gone, the object will continue moving in its current direction
c. The centripetal force is the only thing that keeps the object moving in a circle
d. All of the above**
3. If the distance between two objects increases by a magnitude of four, what happens to the gravitational force between them?
a. It increases by 16
b. It increases by 4
c. It decreases by 16**
d. It decreases by 4
4. Two objects that each have a mass of 10,000 kg are 5.5 m apart. What is the gravitational force between them? (Universal constant of gravitation: 6.67 x 10-11)
a. 2.20 x 10^-4 N**
b. 1.51 x 10^-3 N
c. 2.59 x 10^-5 N
d. 1.99 x 10^-4 N
5. Why does the force of gravity on Earth always pull things down?
a. The force of gravity on Earth is always pointing down
b. The force of gravity on Earth always points to the center of the planet
c. The force of gravity on Earth is a force that repulses**
d. The force of gravity on Earth is a force that pulls objects away from each other
6. According to Kepler's First Law, the Sun is always located where?
a. In the center of a circular orbit
b. In the center of an elliptical orbit**
c. In a location that depends on the location of the object in orbit
d. In one of the foci of an elliptical orbit
7. When an object reaches the farthest part of its orbit away from the Sun, what happens to its orbit?
a. Its orbital speed increases
b. Its orbital speed decreases**
c. Its orbital time changes
d. Its orbital foci object changes
8. The semi major axis of an orbiting body is 3.01 AU. What is the period of this object's orbit?
a. 6.01 years
b. 5.01 years
c. 4.97 years**
d. 5.22 years
Can someone check my answers? Asap please?
1 answer
1 answer